Which best describes a molecule?

O

a unit made of different kinds of elements

a unit made of only one kind of element

a unit made of two or more atoms

a unit made of a single atom

O

O

In full detail, explain what happens during the electrolysis of a NaCl brine? Be sure to identify what is being oxidized and what is being reduced (2). Identify where in the cell the reactions are taking place (2).

Which elements can react to produce a molecular compound? (1) calcium and chlorine (2) hydrogen and sulfur (3) lithium and fluorine (4) magnesium and oxygen

The synthesis of dipropyl ether can be accomplished using 1-propanol. What reactants and conditions are necessary for this to occur

1. Calculate the concentration of hydronium ion of both buffer solutions at their starting pHs. Calculate the moles of hydronium ion present in 20.0 mL of each buffer. 2.

4. How does electron shielding affect atomic size as you move down a group?

Butane gas is used as the fuel in disposable lighters. It burn in oxygen to form carbon dioxide gas and water vapor. What mass of carbon dioxide is produced when 53.3 g of butane is burned in 103.9 g of oxygen

Suppose a solution was too concentrated for an accurate reading with the spectrophotometer. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4.00 mL of water.

What kinds of scientific investagations involve making observations

According to the kinetic molecular theory, when a gas particle hits something what will happen?

Protons and neutrons are made from which of the following? hadrons down quarks only up quarks and down quarks up quarks only